Armature-stripping machine



Nov. 23 1926.

T. S. WALLER ARMATURE STRIPPING MACHINE 2 Sheets-Sheet 1 la if In Nov. 2 3 192e.

T. S, WALLER ARMATURE STRIPPING MACHINE .Mlm w @Howland Patented Nov. 23, 1926.

Lacasse earner eine.

THOMAS S. VVALLER, OF DETROIT, MICHIGAN.

ARMATURE-STRIPPING MACHINE.

Application-filed March 21, 1324. Serial No. 700,791.

In order to rewind the armatures of electrical machines it is necessary that the old winding be removed andV this is a rath-c1 tedious and difficult operation on account of the windings being located in narrow slots of the armature and the ends of the windings more or less interwoven.

My invention aims to provide a machine for expeditiously stripping an armature of its winding without injuring the body of the armature7 the armature shaft or a commutator thereof. In order that my machine may be used the armature windings are cut and removed adjacent the commutator and then .the armature is placed in my machine and the opposite end of the winding held while the body ofthe armature is forced away from the windings. To accomplish this the machine includes novel fingers for supporting the armature winding so that the body of the armature may be withdrawn, and provision is made for simultaneously adjusting the fingers so as to engage in and support the winding. v

The construction. entering into my machine will be hereinafter described and then claimed, and reference will now be had to the drawings, wherein- Figure 1 is a vertical sectional view of the machine;

Fig. 2 is a side elevation of an armature;

Fig. 3 is a cross sectional view of the armature taken on the line III-III of Fig. 2 with some of the windings removed;

Fig. l is a horizontal sectional view of the machine taken on the line IV-IV of Fig. 1;

Fig. 5 is a plan of the machine, 'and Fig. 6 is a detail perspective view of a portion of a finger supporting ring.

In the drawings, the reference numeral 1 denotes an'armature shaft having a commutator 2 and an armature b'dy 3 provided' with the usual insulators 4 and longitudinally disposed slots 5 for the windings 6 of the armature. The `windings 6 are generally crossed or interwoven at the ends of the body 3 and ordinarily there are interstices 7 which I taire advantage of when stripping the armature. The first operation which I perform on the armature is that of cutting and reinoving'the end windings 8 adjacent the commutator thus leaving the windings -free so that theV commutator body may be shifted co-axially of said windings. 'Io

hold the windings while the armature body is shifted, I employ a machine which will now be described. c

9 represents a bench or support having an opening l() and over the opening 10 is iounted a tubular vertically disposed body ll provided with a series of longitudinally circumferentially disposed grooves 12. The body has an exterior-ly screwthreaded enlr-.rgeinent 13 and said body is counter bored and interiorly screwthreaded, as at 14.

Seated in the body 11 is a finger supporting ring 15 which has an annular finger support or fulcruin 16 extending into the counterbored portion of the body 11 and said ring is retained within the body by a sleeve nut 17 in screwthreaded engagement with the screw threads 14 of the body. A spanner wrench or other tool may be employed for screvi'ing the sleeve nut in the body.

A finger support or fulcrum 16 of the ring 15 has slots 18 to facilitate assembling fingers 19 on the support 16. The fingers 19 are placed in the grooves'12 of the body 11 and said fingers are formed with recesses 20 adapted to receive the support or fulcruin 16 of the ring 15. vThe slots 18 aline with the grooves 12 to permit of thefingers 19 being placed in the grooves and then the ring 15 is circumferentially shifted to place the support or fulcrum in the recess 2O of the fingers, so that said fingers will be fuli clrumed or pivotally mounted on the finger ring.

The inner ends of the fingers terminate in angularly disposed end portions 21 and the outer ends of the fingers are formed with cams 22 and prongs 23.v

Screwed on the enlargement 13 of the body 11 is a collaror nut 24; having suitable handles v25 by which the collar or nut may be easily rotated. @ne end of the collar or nut may engage the angular end portions 21 of the `fingers to retract the prongs 23 and the opposite end of the collar or nut may engage the cams 22 of the fingers to distend or force the prongs 23 inwardly.

26 denotes a plunger that may form part of an arbor press or any,machine byl which the plunger 26 may be reciprocated. Y

Attached to the plunger 26 by a coupling member 2.7 is a hollow mandrel 28 adapted to receive onel end of the armature shaft 1 and the mandrel 2(8 has a tapered end'29 adapted to .extend between the armature i rwindings 30er the (rinature and engage the armature body lVith the mandrel wedged between the end windings 3() and the armatur shaft l the armature can be held and lowered into the body ll to such a position that the finger prongs Q3 may be forced into the interstices 7 of the end windings.v This is accomplished by adjusting the collar or -mit Z4- to force the prongs 2? into the interstices so that the armature will be suspended, by its end windings BO, in the body ll of the machine.

Further co-axial movement of the mandrel 28 will force the body 3 from the windings with the armature shaft and its comymutator extending through or into the sleeve nut '17 and the opening l0 of the bench 9. As the mandrel the end windings 30 the tapered end 29 of said mandrei will force the windings outwardly so that none of said windings can crowd in between the mandrel 28 and the Vfinger prongs. Y

After stripping the armature body trom vthe windings the mit or collar 2f-l may be adjusted to engage thel angular end portions '21 of the fingers to retract the prongs 3 and release the aii'niature windings, which may be readily removed from the mandrel.

From the foregoing it wiil be observed that the circumferential arrangement of the vpivoted fingers is such as to Yfully support the end windings 30 so that the armature body 3 may be dragged from said windings and while such operations can be advantageously 'performed with the machine in a vertical position, it is obvious that the same can be accomplished when the machine is i-n a horizontal position possessing the charac- 'teristic'sgof a lathe structure.

In ipractice, and after cutting the end windings 8, said windings may be temporarily left on the armature shaft and with- 'drawn from the main windings as the. armature 'body is withdrawn. It the windings are such as to not leave the armature shaft after a circumferential cut, a longitudinal eut, either before or after separating the HVarmature and main windings, will facilitate removing the end 'windings 8.

It will 'be noted also that my invention "involves a method of removing windings trom armature bodies, the method consist ing in first cutting and removing the winding at one end'of the armature body; supporting the arn'iature vbody by the winding at theopposite end of the armature body, and then causing co-axial incrementbetween said winding and said armature bocy so that the winding and body are separated. In Zview of the factth'at Vthe method may be rcarried l'ont other than by the machine hercin shown and described, I do not care to limit invention other. than defined by the 'appended claims.

28 passes through Y I'Vhat I claim is 65 l. Means for removing windings from an armature body from which windings at one end of said armature body have been cut and removed, 'said means comprising a tiibui lar body, circumferentially disposed lingers 7H pivoted in Said body and adapted to engage in the remaining end windings of' the armature body, means on said body adapted for enga ement with the outer edges of said fingers, to simultaneously shift said lingers, and means supported independent of said body adapted to force the armature body from the windings while `held by said fingers.

'2. Means for removing windings from an armature body from which windings at one 50 'end of said armature body have been `cut and removed, said means comprising a tubular body, circumferentially disposed fingers piyoted in said body and adapted to engage inV the remaining 'end windings Vof the larmature body, a collar surrounding said fingers and rotatable on said body adapted for distending and 'retracting said fingers, and means adapted to 'force the armature body from the windings while held by said fingers. E3. A. machine of the type described comprising a longitudinally slotted scr wthreaded body, fingers pivoted in the slots of said 'body adapted to engage and support van 95 armature winding with an armature body, said fingers having ends protruding from the slots of said body, finger adjusting means on said screwthreaded bocy adapted forengagement with either of' the finger 10 ends. and a mandrel independent of said body and movable into said body adapted to strip the armature body from the'arinature winding.

d. A machine as called 'for in claim 3, 105 wherein said finger adjusting means includes a single collar adapted by rotation vto engage the ends oi' said fingers and either distend or retract ends oit' said fingers.

5. A machine as called for in claim 3, wherein 'a detachable ring in said body serres as a piyotfor all of said fingers.

(i. A machine as called for in claim 3,

Vwherein said mandrel has a tapered end adapted to expand the winding as said armami ture body is stripped from the windings.

7. A machine ot the type described romprising prongs adapted to be forced into the interstices of an armaturewvinding lo hold said wincling,"ineans adapted to engage the outer edges'o'f said prongs to "force said prongs into the interstices of armature winding and a mandrel supported independent oflsaidiprongs adapted to 'force an armature body `from theheld windings.

In testimony whereof I aiiii my signature.

r'i-ioM-As s. WALLER. 

